feat(models): adds a heap size check

Signed-off-by: Stefan Blaginov <[email protected]>
Signed-off-by: Stefan Blaginov <[email protected]>

lib/common/benchmarkModelGenerator.js

@@ -14,6 +14,7 @@
 
 'use strict';
 
+const v8 = require('v8');
 const { Blob } = require('buffer');
 
 const DEFAULT_CONCERTO_METAMODEL_VERSION = '1.0.0';
@@ -349,6 +350,10 @@ class BenchmarkModelGenerator {
         nDeclarations = 1,
         nProperties = 1,
     }) {
+        if (generateUpToSize > v8.getHeapStatistics().total_heap_size) {
+            throw new Error('The requested model size is exceeding the total_heap_size and cannot be created.');
+        }
+
         const model = {
             $class: `concerto.metamodel@${concertoMetamodelVersion}.Model`,
             decorators: [],

test/common/benchmarkModelGenerator.js

@@ -231,5 +231,18 @@ describe('benchmarkModelGenerator', function () {
                 });
             }).should.throw('growBy can be either set to "declarations" or "properties".');
         });
+
+        it('should throw an error if the requested model size exceeds the total_heap_size', function () {
+            const benchmarkModelGenerator = new BenchmarkModelGenerator();
+            benchmarkModelGenerator.should.not.be.null;
+
+            (() => {
+                benchmarkModelGenerator.generateConcertoModels({
+                    generateUpToSize: 100000000000,
+                    growBy: 'properties',
+                    nDeclarations: 5,
+                });
+            }).should.throw('The requested model size is exceeding the total_heap_size and cannot be created.');
+        });
     });
 });